Road signs are meant to be instructive and useful. They're functional not flamboyant. Yet travel the world and you'll find certain civil servants have a sense of humor when it comes to instructing the public how to behave. Take Edinburgh for instance. The Scottish capital is filled with old, narrow streets that often get overcrowded. So signs reminding passengers not to get run over are a necessity. Then there are signs that tell people where not to go, where not to take a dump, and what animals to be careful of (and not get jiggy with).